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Remarkable Aurophilicity and Photoluminescence Thermochromism in a Homoleptic Cyclic Trinuclear Gold(I) Imidazolate Complex
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-09-28 00:00:00 , DOI: 10.1021/acs.inorgchem.7b01679 Mukunda M. Ghimire 1 , Vladimir N. Nesterov 1 , Mohammad A. Omary 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-09-28 00:00:00 , DOI: 10.1021/acs.inorgchem.7b01679 Mukunda M. Ghimire 1 , Vladimir N. Nesterov 1 , Mohammad A. Omary 1
Affiliation
A new aurophilically-bonded cyclic trinuclear gold(I) complex, tris[μ2-(1-ethylimidazolato-N3,C2)gold(I)] ([Au3(EtIm)3], 1), has been synthesized and characterized by temperature-dependent crystallographic and photophysical investigations. The crystal packing of 1 reveals two independent molecules in the unit cell, signifying two distinct pairs of dimer-of-trimer units convened by pairwise intermolecular Au···Au interactions of 3.0662(3) and 3.1407(3) Å at 100 K, representing the shortest pairwise intermolecular aurophilic interactions among all cyclic trimetallic gold(I) complexes to date. Remarkably, crystals of 1 exhibit gigantic photoluminescence thermochromism of 10164 cm–1—from violet to red!—attributed to internal conversion between a higher-energy (T2 → S0; λmax ∼409 nm) and lower-energy (T1 → S0; λmax ∼700 nm) phosphorescent band below and above 200 K, respectively, likely representing an excited-state phase change.
中文翻译:
均一的环状三核咪唑盐金(I)的显着亲光性和光致发光热致变色
一种新的aurophilically键合的环状三核金(I)络合物,三[μ 2 - (1-ethylimidazolato-N 3,C 2)金(I)]([金3(ETIM)3 ],1),已经合成并具有依赖于温度的晶体学和光物理研究的特征。的晶体堆积1揭示了在单元电池的两个独立的分子,表示两个不同的对由成对召集分子间的3.0662(3)和3.1407(3)的Au ...的Au相互作用在100K二聚体的三聚体单元的,代表迄今为止所有环状三金属金(I)配合物之间最短的成对分子间亲和性相互作用。明显地,1的晶体表现出10164厘米的巨大的光致发光热致变色-1! -从紫罗兰到更高的能量之间-attributed到内部转换红色(T 2 →S 0 ;λ最大~409纳米)和低能量(T 1 →S 0 ;λ低于和高于200 K的最大磷光带(最大约为700 nm),可能表示激发态相变。
更新日期:2017-09-28
中文翻译:
均一的环状三核咪唑盐金(I)的显着亲光性和光致发光热致变色
一种新的aurophilically键合的环状三核金(I)络合物,三[μ 2 - (1-ethylimidazolato-N 3,C 2)金(I)]([金3(ETIM)3 ],1),已经合成并具有依赖于温度的晶体学和光物理研究的特征。的晶体堆积1揭示了在单元电池的两个独立的分子,表示两个不同的对由成对召集分子间的3.0662(3)和3.1407(3)的Au ...的Au相互作用在100K二聚体的三聚体单元的,代表迄今为止所有环状三金属金(I)配合物之间最短的成对分子间亲和性相互作用。明显地,1的晶体表现出10164厘米的巨大的光致发光热致变色-1! -从紫罗兰到更高的能量之间-attributed到内部转换红色(T 2 →S 0 ;λ最大~409纳米)和低能量(T 1 →S 0 ;λ低于和高于200 K的最大磷光带(最大约为700 nm),可能表示激发态相变。